Difference between revisions of "HOWTO import SRTM elevation data"
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Background: [http://www2.jpl.nasa.gov/srtm/ Space Shuttle Radar Topography Mission] | Background: [http://www2.jpl.nasa.gov/srtm/ Space Shuttle Radar Topography Mission] | ||
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| + | == Download == | ||
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| + | * http://www2.jpl.nasa.gov/srtm/ | ||
| + | * ftp://e0srp01u.ecs.nasa.gov/srtm/ | ||
== Import of original SRTM tiles in HGT format == | == Import of original SRTM tiles in HGT format == | ||
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See: | See: | ||
| − | * M.H. Bowman. ''Mapping freely available high resolution global elevation and vector data in GRASS.'' GRASS Newsletter, Vol.3, pp 7-10, June 2005. [ [http://grass.osgeo.org/newsletter/GRASSNews_vol3.pdf PDF] ] | + | * M.H. Bowman. ''Mapping freely available high resolution global elevation and vector data in GRASS.'' GRASS Newsletter, Vol.3, pp 7-10, June 2005. [ [http://grass.osgeo.org/newsletter/GRASSNews_vol3.pdf PDF] ] |
== Import of CGIAR SRTM void-filled tiles == | == Import of CGIAR SRTM void-filled tiles == | ||
Revision as of 23:52, 26 May 2009
Background: Space Shuttle Radar Topography Mission
Contents
Download
Import of original SRTM tiles in HGT format
Use the r.in.srtm module for automated import into a Latitude-Longitude location.
See:
- M.H. Bowman. Mapping freely available high resolution global elevation and vector data in GRASS. GRASS Newsletter, Vol.3, pp 7-10, June 2005. [ PDF ]
Import of CGIAR SRTM void-filled tiles
- SRTM 90 data in GeoTIFF format are available from http://srtm.csi.cgiar.org/. These come in 5 degree by 5 degree tiles. Horizontal resolution: 3 arc second (90 m at equator). Coverage: world. Import with r.in.gdal
Import of multiple SRTM tiles in one step
To simplify the import of multiple SRTM tiles, the tiles can be mosaicked first with gdalwarp:
Original SRTM tiles:
# unzip all for i in *.hgt.zip ; do unzip $i ; done # create mosaik (optionally reproject on the fly with -t_srs) gdalwarp *.hgt srtm_mosaik.tif # import r.in.gdal input=srtm_mosaik output=srtm_mosaik
CGIAR SRTM tiles:
# create mosaik (optionally reproject on the fly with -t_srs) gdalwarp *.tif srtm_mosaik.tif # import r.in.gdal input=srtm_mosaik output=srtm_mosaik
Void filling of original SRTM tiles
The module r.fillnulls can be used. See screenshot
See:
- M. Neteler, 2005. SRTM and VMAP0 data in OGR and GRASS. GRASS Newsletter, Vol.3, pp 2-6, June 2005. [ PDF | Erratum 1/2006 (txt) ]
See also
- SRTM in Wikipedia
